Unsaturated polyesters colored with lignin

Details Unsaturated polyesters colored with lignin Unsaturated polyesters colored with lignin

1987-06-22

1988-09-13

Nielsen, Earl

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ethylenically unsaturated reactant admixed with either...

523510, 523511, 527400, C08H 502, C08G 6352

Patent

active

047711019

ABSTRACT:
Colored unsaturated polyesters having copolymerized therein lignin and lignin derivatives which condense during polymerization into the polyester chain are disclosed. The lignin moieties are thermally stable at the polymer processing temperature and are nonextractable from the polymer making these colored polyesters suitable for use in bathroom fixtures, boats, certain automotive applications and the like.

REFERENCES:
patent: 2209289 (1940-07-01), Wallace
patent: 3503762 (1970-03-01), Remer
patent: 4102944 (1978-07-01), Fukuyama et al.
patent: 4279788 (1981-07-01), Lambuth

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